Re: [EFM-P2MP] FW: [EFM] EFM FEC Proposals
Ajay,
I have received some traffic packet size measurement statistics from another source that
confirm the numbers you used to conclude an additional 6% throughput penalty with the
frame based FEC proposal. To me, the main decision to be made in choosing between stream
FEC or frame FEC is:
Is the operation with non-FEC receivers worth the cost of the additional 6% penalty?
Regards,
Larry
Ajay Gummalla wrote:
> Larry and all:
> I have attached a slide which compares the two proposals.
> I am hoping that this will generate more discussions and help
> us make progress.
>
> Please take a look at
> http://www.ieee802.org/3/efm/public/jul02/p2mp/gummalla_p2mp_1_0702.pdf
> for the calculations on efficiency.
>
> Best Regards,
> Ajay
> > -----Original Message-----
> > From: owner-stds-802-3-efm@majordomo.ieee.org
> > [mailto:owner-stds-802-3-efm@majordomo.ieee.org]On Behalf Of larry
> > rennie
> > Sent: Monday, July 01, 2002 6:31 PM
> > To: stds-802-3-efm
> > Subject: [EFM] EFM FEC Proposals
> >
> >
> >
> > Fellow EFM Task Force Members,
> >
> > At the last EFM meeting in Edinburgh we passed the following FEC motion:
> >
> > 17. Motion to add an FEC option for the 1Gig P2P and P2MP PHY,
> > maintaining backward compatibility with the 1000BASE-X PCS, for the
> > following reasons:
> > 1. Improves reach of a MPN limited link by 50% for links with MPN
> > penalty of about 2dB
> > 2. Permits operation at a SNR lower by 2.5 dB for non-dispersion
> > limited links.
> >
> > Two different FEC implementation proposals will be presented in
> > Vancouver and they are posted under the General Session material on the
> > EFM web site. One proposal is frame based and the other is stream
> > based. If you are at all interested in FEC for EFM, I encourage you to
> > please take a look at these two proposals and get your comments and
> > questions back onto the reflector before the meeting. This will give
> > the presenters and their supporters time to formulate a proper response
> > and will conserve our precious meeting time in Vancouver.
> >
> > Regards,
> >
> > Larry
> >
> >
> >
> >
> >
> >
>
> ------------------------------------------------------------------------
> Name: Comparison of FEC proposals.pdf
> Comparison of FEC proposals.pdf Type: Portable Document Format (application/pdf)
> Encoding: base64